Himabindu Krishnamurthy¹, K Chandrasekharan Nair²* and Jayakar Shetty³

¹Consultant Prosthodontist and Implantologist, Dental Therapist, 31 Hollinwood View, Bingley, UK
²Professor Emeritus, Department of Prosthodontics, Sri Sankara Dental College, Akathumuri, Thiruvananthapuram, Kerala, India
³Former Professor and Principal, AECS Maaruti College of Dental Sciences, Bangalore, India

*Corresponding Author: K Chandrasekharan Nair, Professor Emeritus, Department of Prosthodontics, Sri Sankara Dental College, Akathumuri, Thiruvananthapuram, Kerala, India.

Received: December 04, 2023; Published: December 27, 2023

Abstract

Background: •To determine and compare the surface roughness of heat and chemically cured acrylic resins after subjecting them to mechanical polishing, chemical polishing and chemical polishing with microwaving.
• To find out the surface roughness and weight loss caused by tooth brushes and dentifrices on heat and chemically cured acrylic resins which were subjected to mechanical polishing, chemical polishing and chemical polishing with microwaving.

Materials and Methods: Rectangular specimens were prepared and they were subjected to mechanical polishing, chemical polishing and chemical polishing with microwaving. These specimens were then subjected to tooth brushing with tooth pastes. Surface roughness and weight of the specimens were measured before and after tooth brushing. Medium and hard tooth brushes and one regular tooth paste and one gel tooth paste were included. Brushing was done with a motor driven device and the brushing cycles were limited to 30,000. Data was statistically analyzed using ANOVA.

Conclusions • Heat cure acrylic resin can resist surface roughness better than self cure resins. The roughness values observed in both the resins were within the clinically acceptable limits.
• Heat cure resin which is mechanically polished can resist surface roughness better than in chemically polished specimens.
• Tooth brushes and pastes included in the study will not cause surface roughness beyond the acceptable limit within a period of three years.
• Heat cure acrylic resin undergoes more weight loss than self cure resin when subjected to brushing with tooth pastes.
• Microwaving did not particularly improve the properties of the resins to resist surface roughness and weight loss.

Keywords:Polymethylmethacrylate; Chemical Polishing; Mechanical Polishing; Chemical Polishing and Microwaving; Brushing Simulator; Surface Roughness; Weight Loss

References

1. Redtenbacher J. “Ueber die zerlegungsprodukte des glyceryloxydes durch trockene distillation”. Justus Liebigs Annalen der Chemie 47 (1843): 113-148.
2. Peyton FA. “History of resins in dentistry”. Dental Clinics of North America 19 (1975): 211-222.
3. Kraft J. “Polymethylmethacrylate-A review “. The Journal of Foot and Ankle Surgery 16 (1977): 66-68.
4. Frazer RQ., et al. “PMMA: An essential material in medicine and dentistry”. Journal of Long-Term Effects of Medical Implants 15 (2005): 629-639.
5. Zidan S., et al. “Investigating the mechanical properties of ZrO2-impregnated PMMA nanocomposite for denture-based applications”. Materials 12 (2005):
6. Khaled Alhallak., et al. “A review on clinical use of CAD/CAM and 3D printed dentures”. British Dental Journal (2023).
7. Abuzar MA., et al. “Evaluating surface roughness of a polyamide denture base material in comparison with poly (methyl methacrylate)”. Journal of Oral Science 52 (2010): 577-581.
8. “Dentistry-Denture base polymers: International Organization for Standardization (1999).
9. Baba Y., et al. “Effectiveness of a combination denture-cleaning method versus a mechanical method: comparison of denture cleanliness, patient satisfaction, and oral health-related quality of life”. Journal of Prosthodontic Research 62 (2018): 353-358.
10. Shah VR., et al. “Evaluation of flexural strength and color stability of different denture base materials including flexible material after using different denture cleansers”. The Journal of Indian Prosthodontic Society 15 (2015): 367-373.
11. Yamauchi M., et al. “In vitro adherence of microorganisms to denture base resin with different surface texture”. Dental Materials Journal 9 (1990): 19-24.
12. Sofou A., et al. “The effect of different polishing techniques on the surface roughness of acrylic resin materials”. European Journal of Prosthodontics and Restorative Dentistry 9 (2005): 117-122.
13. Al-Rifaiy, MQ. “The effect of mechanical and chemical polishing techniques on the surface roughness of denture base acrylic resins”. The Saudi Dental Journal 22 (2010): 13-17.
14. Rahal JS., et al. “Surface roughness of acrylic resins submitted to mechanical and chemical polishing”. Journal of Oral Rehabilitation 31 (2004): 1075-1079.
15. Žilinskas J., et al. “The effect of cleaning substances on the surface of denture base material”. Medical Science Monitor 19 (2013): 1142-1145.
16. Žilinskas J., et al. “The effect of cleaning substances on the surface of denture base material^©”. Medical Science Monitor 19 (2013): 1142-1145.
17. Haselden CA., et al. “A comparison between the wear resistance of three types of denture resin to three different dentifrices”. Journal of Oral Rehabilitation 25 (1998): 335-339.
18. Yen-Hao CHANG., et al. “Effect of toothbrush/dentifrice abrasion on weight variation, surface roughness, surface morphology and hardness of conventional and CAD/CAM denture base materials”. Dental Materials Journal 1 (2021): 220-227.
19. Burgett FG and Ash MM. “Comparative Study of the Pressure of Brushing with Three Types of Toothbrushes”. Journal of Periodontology 45 (1974): 410-413.
20. Rahal JS., et al. “Surface roughness of acrylic resins submitted to mechanical and chemical polishing”. Journal of Oral Rehabilitation 31 (2004): 1075-1079.
21. Karina Matthes de Freitas Pontes., et al. “Effect of toothbrushes and denture brushes on heat-polymerized acrylic resins”. General Dentistry (2016): 49-53.
22. Yap AU., et al. “Effect of hygiene maintenance procedures on surface roughness of composite restoratives”. Operative Dentistry 1 (2005): 99-104.

Citation

Citation: K Chandrasekharan Nair., et al. “Surface Roughness and Weight Loss of Heat Cure and Self-Cure Acrylic Resins Which Were Subjected to Tooth Brush and Tooth Paste Cleaning-an In Vitro Study".Acta Scientific Dental Sciences 8.1 (2024): 95-102.

Copyright

Copyright: © 2024 K Chandrasekharan Nair., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.